Data Sheet September 2006 FN6312.0 Dual Micropower Single Supply

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Data Sheet September 2006 FN6312.0 Dual Micropower Single Supply

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ISL28286, ISL28486
Data Sheet September 2006 FN6312.0
Dual Micropower Single Supply Rail-to-Rail Input Output (RRIO) Precision Op-Amp
ISL28286 ISL28486 Dual Quad channel micropower precision operational amplifiers optimized single supply operation down 2.4V. equivalent performance single channel op-amp reference EL8186. ISL28286 ISL28486 feature Input Range Enhancement Circuit (IREC) which enables both parts maintain CMRR performance input voltages equal positive negative supply rails. input signal capable swinging above positive supply rail ground with only slight degradation CMRR performance. output operation rail rail. Both parts draw minimal supply current while meeting excellent DC-accuracy, AC-performance, noise output drive specifications. ISL28286 ISL28486 operated from single lithium cell Ni-Cd batteries. input range includes both positive negative rail.
Features
120µA supply current both channels 600µV offset voltage 500pA input bias current 400kHz gain-bandwidth product 115dB PSRR CMRR Single supply operation down 2.4V Input capable swinging above (ground sensing) Rail-to-rail input output (RRIO) Pb-free plus anneal available (RoHS compliant)
Applications
Battery- solar-powered systems 25mA current loops Handheld consumer products Medical devices Thermocouple amplifiers
Ordering Information
PART NUMBER ISL28286FUZ (See Note) PART MARKING 8286Z TAPE REEL 50/Tube PACKAGE PKG. DWG.
Photodiode pre-amps probe amplifiers
MSOP MDPOO43 (Pb-free)
ISL28286FUZ-T7 8286Z (See Note) Coming Soon ISL28486FAZ (Note) 28486FAZ
MSOP MDP0043 (1500 pcs) (Pb-free) 97/Tube QSOP MDP0040 (Pb-free)
28486FAZ Coming Soon ISL28486FAZ-T7 (Note)
QSOP MDP0040 (1000 pcs) (Pb-free)
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials 100% matte plate termination finish, which RoHS compliant compatible with both SnPb Pb-free soldering operations. Intersil Pb-free products classified Pb-free peak reflow temperatures that meet exceed Pb-free requirements IPC/JEDEC STD-020.
CAUTION: These devices sensitive electrostatic discharge; follow proper Handling Procedures. 1-888-INTERSIL 1-888-468-3774 Intersil (and design) registered trademark Intersil Americas Inc. Copyright Intersil Americas Inc. 2006. Rights Reserved other trademarks mentioned property their respective owners.
ISL28286, ISL28486 Pinouts
ISL28286 MSOP) VIEW
IN+_A EN_A EN_B IN+_B IN-_A OUT_A OUT_B IN-_B OUT_A IN-_A IN+_A IN+_B IN-_B OUT_B
ISL28486 QSOP) VIEW
OUT_D IN-_D IN+_D IN+_C IN-_C OUT_C
FN6312.0 September 2006
ISL28286, ISL28486
Absolute Maximum Ratings +25°C)
Supply Voltage 5.5V Supply Turn Voltage Slew Rate 1V/s Differential Input Current Differential Input Voltage 0.5V Input Voltage 0.5V 0.5V tolerance, Human Body Model .3kV tolerance, Machine Model .300V Output Short-Circuit Duration .Indefinite Ambient Operating Temperature Range .-40°C +125°C Storage Temperature Range .-65°C +150°C Operating Junction Temperature +125°C
CAUTION: Stresses above those listed "Absolute Maximum Ratings" cause permanent damage device. This stress only rating operation device these other conditions above those indicated operational sections this specification implied. IMPORTANT NOTE: parameters having Min/Max specifications guaranteed. Typical values information purposes only. Unless otherwise noted, tests specified temperature pulsed tests, therefore:
Operating Junction
Electrical Specifications
0V,VCM 2.5V, +25°C unless otherwise specified. Boldface limits apply over operating temperature range, -40°C +125°C, temperature data guaranteed characterization CONDITIONS -600 -650
PARAMETER -Time
DESCRIPTION Input Offset Voltage Long Term Input Offset Voltage Stability Input Offset Drift Temperature Input Offset Current Input Bias Current Input Noise Voltage Peak-to-Peak Input Noise Voltage Density
UNIT µV/Mo µV/°C
-1.5 -1.5 -2.5 0.1Hz 10Hz 1kHz 1kHz Guaranteed CMRR test 2.4V 0.5V 4.5V, 100k 0.5V 4.5V, 4.990 4.97 4.800 4.750 0.13 0.10 0.10 0.09 4.996 4.880 0.17 0.13 0.20 0.25 0.17 0.19
±0.25
µVPP nV/Hz pA/Hz
±0.5
0.18
CMIR CMRR PSRR AVOL
Input Noise Current Density Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large Signal Voltage Gain
V/mV V/mV V/µs V/µs
VOUT
Maximum Output Voltage Swing
Output low, 100k Output low, Output high, 100k Output high,
Positive Slew Rate Negative Slew Rate
FN6312.0 September 2006
ISL28286, ISL28486
Electrical Specifications
0V,VCM 2.5V, +25°C unless otherwise specified. Boldface limits apply over operating temperature range, -40°C +125°C, temperature data guaranteed characterization (Continued) CONDITIONS channels enabled. channels disabled. -0.1 +0.1 UNIT
PARAMETER IS,ON IS,OFF ISC+ ISCVS VINH VINL IENH IENL
DESCRIPTION Gain Bandwidth Product Supply Current, Enabled Supply Current, Disabled Short Circuit Sourcing Capability Short Circuit Sinking Capability Minimum Supply Voltage Enable High Level Enable Level Enable Input Current Enable Input Current
Typical Performance Curves
GAIN (dB) 100k FREQUENCY (Hz) Vout 50mVp-p 0/RG ±2.5V ±2.5V ±1.2V ±1.2V GAIN (dB) ±1.25V ±2.5V 2.7pF 99.02 ±1.0V 221k 2.23k 100k FREQUENCY (Hz)
FIGURE FREQUENCY RESPONSE SUPPLY VOLTAGE
FIGURE FREQUENCY RESPONSE SUPPLY VOLTAGE
INPUT OFFSET VOLTAGE (µV) INPUT OFFSET VOLTAGE (µV) VDD/2 -100 -150 -200 OUTPUT VOLTAGE 2.5V
VOS,
-100 COMMON-MODE INPUT VOLTAGE
FIGURE INPUT OFFSET VOLTAGE OUTPUT VOLTAGE
FIGURE INPUT OFFSET VOLTAGE COMMON-MODE INPUT VOLTAGE
FN6312.0 September 2006
ISL28286, ISL28486 Typical Performance Curves
GAIN (dB) 100k FREQUENCY (Hz)
(Continued)
PHASE -120 GAIN (dB) PHASE GAIN -100 -150 PHASE
100k
FREQUENCY (Hz)
FIGURE AVOL FREQUENCY 100k LOAD
FIGURE AVOL FREQUENCY LOAD
PSRR (dB) PSRR 5VDC VSOURCE 1Vp-p 100k 100k PSRR CMRR(dB)
5VDC VSOURCE 1Vp-p 100k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE PSRR FREQUENCY
FIGURE CMRR FREQUENCY
2.56 2.54 2.52 VOLTS 2.50 2.48 2.46 2.44 2.42 TIME (µs) 5VDC VOUT 0.1Vp-p VOLTS VOUT
VOUT TIME (µs) 5VDC VOUT 0.1Vp-p VOUT
FIGURE SMALL SIGNAL TRANSIENT RESPONSE
FIGURE LARGE SIGNAL TRANSIENT RESPONSE
FN6312.0 September 2006
ISL28286, ISL28486 Typical Performance Curves
10.00 CURRENT NOISE (pA/Hz) VOLTAGE NOISE (nV/Hz)
(Continued)
1.00
0.10
0.01 100k FREQUENCY (Hz)
100k FREQUENCY (Hz)
FIGURE CURRENT NOISE FREQUENCY
FIGURE VOLTAGE NOISE FREQUENCY
VOLTAGE NOISE (1µV/DIV) VOLTS
100K
100K
Function Generator 33140A
VOUT
4.5µVP-P
TIME (1s/DIV) TIME (ms)
FIGURE 0.1Hz 10Hz INPUT VOLTAGE NOISE
FIGURE INPUT VOLTAGE SWING ABOVE SUPPLY
0.1V/DIV SUPPLY VOLTAGE VOUT 1V/DIV Input 200mVp-p
SUPPLY CURRENT (µA)
10µs/DIV
FIGURE SUPPLY CURRENT SUPPLY VOLTAGE
FIGURE ENABLE OUTPUT DELAY TIME
FN6312.0 September 2006
ISL28286, ISL28486 Typical Performance Curves
CURRENT (µA) TEMPERATURE (°C) MEDIAN CURRENT (µA)
(Continued)
MEDIAN
TEMPERATURE (°C)
FIGURE SUPPLY CURRENT TEMPERATURE ±2.5V ENABLED.
FIGURE SUPPLY CURRENT TEMPERATURE ±2.5V DISABLED.
CURRENT (nA) -0.2 -0.4 -0.6
CURRENT (nA) TEMPERATURE (°C) -0.2 -0.4
MEDIAN
MEDIAN
TEMPERATURE (°C)
FIGURE BIAS(+) TEMPERATURE ±2.5V
FIGURE BIAS(+) TEMPERATURE ±1.2V
CURRENT (nA) -0.5 -1.5
CURRENT (nA) -0.5 -1.5 TEMPERATURE (°C) TEMPERATURE (°C)
MEDIAN
MEDIAN
FIGURE BIAS(-) TEMPERATURE ±2.5V
FIGURE BIAS(-) TEMPERATURE ±1.2V
FN6312.0 September 2006
ISL28286, ISL28486 Typical Performance Curves
CURRENT (nA) -0.5 -1.5 TEMPERATURE (°C) MEDIAN CURRENT (pA) -0.5 TEMPERATURE (°C) MEDIAN
(Continued)
FIGURE INPUT OFFSET CURRENT TEMPERATURE ±2.5V
FIGURE INPUT OFFSET CURRENT TEMPERATURE ±1.2V
(µV) MEDIAN -100 -200 -300 -400 -500 TEMPERATURE (°C)
(µV) -100 -200 -300 -400 TEMPERATURE (°C)
MEDIAN
FIGURE INPUT OFFSET VOLTAGE TEMPERATURE ±2.5V
FIGURE INPUT OFFSET VOLTAGE TEMPERATURE\ ±1.2V
PSRR (dB) CMRR (dB)
MEDIAN TEMPERATURE (°C)
TEMPERATURE (°C) MEDIAN
FIGURE CMRR TEMPERATURE +2.5V -2.5V
FIGURE PSRR TEMPERATURE ±2.5V
FN6312.0 September 2006
ISL28286, ISL28486 Typical Performance Curves
4.91 4.89 VOUT 4.88 4.87 MEDIAN 4.86 4.85 4.84 TEMPERATURE (°C) TEMPERATURE (°C) VOUT (mV) MEDIAN
(Continued)
FIGURE POSITIVE VOUT TEMPERATURE ±2.5V
FIGURE NEGATIVE VOUT TEMPERATURE ±2.5V
4.9985 4.998 4.9975 VOUT
MEDIAN 4.997 4.9965 4.996 4.9955
VOUT (mV)
MEDIAN
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE POSITIVE VOUT TEMPERATURE 100k ±2.5V
FIGURE NEGATIVE VOUT TEMPERATURE 100k ±2.5V
0.032 0.031 0.03 (µA) 0.029 0.028 0.027 0.026
0.95 0.85 (µA) 0.75 MEDIAN 0.65 TEMPERATURE (°C) TEMPERATURE (°C) MEDIAN
FIGURE (EN) TEMPERATURE ±2.5V
FIGURE (EN) TEMPERATURE ±2.5V
FN6312.0 September 2006
ISL28286, ISL28486 Typical Performance Curves
0.23 0.21 SLEW RATE (V/µs) 0.19 0.17 0.15 0.13 0.11 0.09 TEMPERATURE (°C) 0.11 TEMPERATURE (°C) MEDIAN CURRENT (pA)
(Continued)
0.17 0.16 0.15 0.14 0.13 0.12 MEDIAN
FIGURE SLEW RATE TEMPERATURE ±2.5V INPUT ±0.75V
FIGURE SLEW RATE TEMPERATURE ±2.5V INPUT ±0.75V
AVOL (V/mV) MEDIAN TEMPERATURE (°C) AVOL (V/mV)
MEDIAN
TEMPERATURE (°C)
FIGURE AVOL TEMPERATURE 100K ±2.5V
FIGURE AVOL TEMPERATURE 100K ±2.5V
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD POWER DISSIPATION POWER DISSIPATION AMBIENT TEMPERATURE (°C) 893mW
JEDEC JESD51-3 EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD 633mW
AMBIENT TEMPERATURE (°C)
FIGURE PACKAGE POWER DISSIPATION AMBIENT TEMPERATURE
FIGURE PACKAGE POWER DISSIPATION AMBIENT TEMPERATURE
FN6312.0 September 2006
ISL28286, ISL28486 Typical Performance Curves
POWER DISSIPATION
(Continued)
JEDEC JESD51-3 EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD POWER DISSIPATION
870mW
8/10
486mW
8/10
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
FIGURE PACKAGE POWER DISSIPATION AMBIENT TEMPERATURE
FIGURE PACKAGE POWER DISSIPATION AMBIENT TEMPERATURE
Descriptions
ISL28286 ISL28486 MSOP) QSOP) NAME IN+_A EN_A VEN_B IN+_B IN-_B OUT_B OUT_A IN-_A OUT_C IN-_C IN+_C IN+_D IN-_D OUT_D EQUIVALENT CIRCUIT Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Amplifier non-inverting input Amplifier enable internal pull-down; Logic selects disabled state; Logic selects enabled state. Negative power supply Amplifier enable with internal pull-down; Logic selects disabled state; Logic selects enabled state. Amplifier non-inverting input Amplifier inverting input Amplifier output Positive power supply Amplifier output Amplifier inverting input Amplifier output Amplifier inverting input Amplifier non-inverting input Amplifier non-inverting input Amplifier inverting input Amplifier output internal connection
LOGIC VCIRCUIT CIRCUIT VVCIRCUIT
DESCRIPTION
CAPACITIVELY COUPLED CLAMP
CIRCUIT
FN6312.0 September 2006
ISL28286, ISL28486 Applications Information
Introduction
ISL28286 ISL28486 enhanced rail-to-rail input micropower precision operational amplifiers with enable feature. part designed operate from single supply (2.4V 5.0V) dual supply (±1.2V ±2.5V). device capable swinging above positive supply rail ground. parts maintains CMRR performance input voltages equal positive supply. output operation swing within about supply rails with 100k load (reference Figures through 32).
Rail-to-Rail Output
pair complementary MOSFET devices used achieve rail-to-rail output swing. NMOS sinks current swing output negative direction. PMOS sources current swing output positive direction. Both parts with 100k load will swing within supply rails.
Enable/Disable Feature
ISL28286 ISL28486 offer that disables device when pulled least 2.0V. disabled state (output high impedance state), part consumes typically 4µA. disabling part, multiple parts connected together MUX. outputs tied together parallel channel selected pin. also internal pull down. left open, will pull negative rail device will enabled default.
Rail-to-Rail Input
input common-mode voltage range both parts goes from 10mV above negative supply positive supply without introducing additional offset errors degrading performance associated with conventional rail-to-rail input operational amplifier. Many rail-to-rail input stages differential input pairs, long-tail PFET) NFET). Severe penalties have paid this circuit topology. input signal moves from supply rail another, operational amplifier switches from input pair other causing drastic changes input offset voltage undesired change magnitude polarity input offset current. ISL28286 ISL28486 achieves input rail-to-rail without sacrificing important precision specifications degrading distortion performance. devices' input offset voltage exhibits smooth behavior throughout entire common-mode input range. input bias current versus common-mode voltage range gives undistorted behavior from negative rail higher than rail (0.5V higher than when equals 5V).
Using Only Channel
ISL28286 ISL28486 Dual Quad channel op-amps. application only requires channel when using ISL28286 less than channels when using ISL28486, user must configure unused channel prevent them from oscillating. unused channel will oscillate input output pins floating. This will result higher than expected supply currents possible noise injection into channel being used. proper prevent this oscillation short output negative input ground positive input shown Figure 43).
ISL28286 ISL28486
Input Protection
input terminals have internal protection diodes both positive negative supply rails, limiting input voltage within diode beyond supply rails. Both parts have additional back-to-back diodes across input terminals. overdriving inputs necessary, external input current must never exceed 5mA. External series resistors used external protection limit excessive external voltage current from damaging inputs.
FIGURE PREVENTING OSCILLATIONS UNUSED CHANNELS
Proper Layout Maximizes Performance
achieve maximum performance high input impedance offset voltage ISL28286 ISL28486, care should taken circuit board layout. board surface must remain clean free moisture avoid leakage currents between adjacent traces. Surface coating circuit board will reduce surface moisture provide humidity barrier, reducing parasitic resistance board. When input leakage current concern, guard rings around amplifier inputs will further reduce leakage currents. Figure shows guard ring example unity gain amplifier that uses impedance amplifier output same voltage high impedance input eliminate surface leakage. guard ring does need specific width, should form continuous loop around both inputs. further reduction leakage currents, components mounted
Input Bias Current Compensation
input bias currents decimated down typical 500pA while maintaining excellent bandwidth micropower operational amplifier. Inside ISL28286 ISL28478 input bias canceling circuit. input stage transistors still biased with adequate current speed canceling circuit sinks most base current, leaving small fraction input bias current.
FN6312.0 September 2006
ISL28286, ISL28486
board using Teflon standoff insulators.
HIGH IMPEDANCE INPUT ISL28286
Current Limiting
ISL28286 ISL28486 have internal currentlimiting circuitry. output shorted, possible exceed Absolute Maximum Rating output current power dissipation, potentially resulting destruction device.
Power Dissipation
FIGURE GUARD RING EXAMPLE UNITY GAIN AMPLIFIER
Example Application
Thermocouples most popular temperature-sensing device because their cost, interchangeability, ability measure wide range temperatures. ISL28286 (Figure used convert differential thermocouple voltage into single-ended signal with gain. ISL28286's rail-to-rail input characteristic allows thermocouple biased ground converter from single supply.
100k TYPE THERMOCOUPLE ISL28286
possible exceed +150°C maximum junction temperatures under certain load power-supply conditions. therefore important calculate maximum junction temperature (TJMAX) applications determine power supply voltages, load conditions, package type need modified remain safe operating area. These parameters related follows:
JMAX MAXTOTAL (EQ.
where: PDMAXTOTAL maximum power dissipation each amplifier package (PDMAX) PDMAX each amplifier calculated follows:
OUTMAX SMAX OUTMAX (EQ.
410µV/°C
where: TMAX Maximum ambient temperature Thermal resistance package
100k
PDMAX Maximum power dissipation amplifier Supply voltage IMAX Maximum supply current amplifier VOUTMAX Maximum output voltage swing application Load resistance
FIGURE THERMOCOUPLE AMPLIFIER
FN6312.0 September 2006
ISL28286, ISL28486 Mini Package Family (MSOP)
0.25 (N/2)+1
MDP0043
MINI PACKAGE FAMILY SYMBOL MSOP8 1.10 0.10 0.86 0.33 0.18 3.00 4.90 3.00 0.65 0.55 0.95 MSOP10 1.10 0.10 0.86 0.23 0.18 3.00 4.90 3.00 0.50 0.55 0.95 TOLERANCE Max. ±0.05 ±0.09 +0.07/-0.08 ±0.05 ±0.10 ±0.15 ±0.10 Basic ±0.15 Basic Reference NOTES Rev. 6/99
I.D.
(N/2)
SEATING PLANE 0.10 LEADS
0.08
NOTES: Plastic metal protrusions 0.15mm maximum side included. Plastic interlead protrusions 0.25mm maximum side included. Dimensions "E1" measured Datum Plane "H".
DETAIL
Dimensioning tolerancing ASME Y14.5M-1994.
GAUGE PLANE DETAIL
0.25
FN6312.0 September 2006
ISL28286, ISL28486 Quarter Size Outline Plastic Packages Family (QSOP)
(N/2)+1
MDP0040
QUARTER SIZE OUTLINE PLASTIC PACKAGES FAMILY SYMBOL QSOP16 QSOP24 QSOP28 TOLERANCE NOTES
I.D. MARK
0.068 0.006 0.056 0.010 0.008 0.193 0.236 0.154 0.025 0.025 0.041
0.068 0.006 0.056 0.010 0.008 0.341 0.236 0.154 0.025 0.025 0.041
0.068 0.006 0.056 0.010 0.008 0.390 0.236 0.154 0.025 0.025 0.041
Max. ±0.002 ±0.004 ±0.002 ±0.001 ±0.004 ±0.008 ±0.004 Basic ±0.009 Basic Reference
Rev. 3/01
0.010
(N/2)
SEATING PLANE 0.004 0.007
NOTES:
DETAIL
Plastic metal protrusions 0.006" maximum side included. Plastic interlead protrusions 0.010" maximum side included. Dimensions "E1" measured Datum Plane "H". Dimensioning tolerancing ASME Y14.5M-1994.
0.010 GAUGE PLANE 4°±4° DETAIL
Intersil U.S. products manufactured, assembled tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications viewed www.intersil.com/design/quality
Intersil products sold description only. Intersil Corporation reserves right make changes circuit design, software and/or specifications time without notice. Accordingly, reader cautioned verify that data sheets current before placing orders. Information furnished Intersil believed accurate reliable. However, responsibility assumed Intersil subsidiaries use; infringements patents other rights third parties which result from use. license granted implication otherwise under patent patent rights Intersil subsidiaries.
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FN6312.0 September 2006

Data Sheet September 2006 FN6312.0 Dual Micropower Single Supply

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